New Email User creation error!

New Email User creation error!

Hi

When I create an email address as karan@dioconsulting.com . It creates the user but says no mailbox attached. When I try to create the mailbox it says email address already exists.

Please delete karan@dioconsulting.com from zoho database so that I can create the user accordingly.

Thank you

Regards
Karan Chowdhary